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Resource Information:

National Vegetation Information System (NVIS) Version 4.1 - Australia - Key Layer for the Sources of Estimated Pre-1750 Vegetation Data

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Creation Date: 20090920
Revision Date: 20121019
Presentation format: digital map
Unique resource identifier:

Party responsible for the resource:
Organisation's name: Australian Government Department of the Environment
Contact's position: Vegetation Data Manager
Contact's role: custodian
Contact information:
Phone:
Voice: 02 6274 1111
Fax: 02 6274 1666
Address:
Delivery point:
GPO Box 787
City: Canberra
Administrative area: ACT
Postal code: 2601
Country: Australia
e-mail address: vegetation.metadata@environment.gov.au

Party responsible for the resource:
Organisation's name: Australian Government Department of the Environment
Contact's position: Metadata Publisher
Contact's role: publisher
Contact information:
Phone:
Voice: (02) 6274 1111
Fax: (02) 6274 1333
Address:
Delivery point:
GPO Box 787
City: CANBERRA
Administrative area: ACT
Postal code: 2601
Country: Australia
e-mail address: metadata@environment.gov.au

Themes or categories of the resource: biota
Theme keywords:
VEGETATION
FLORA Native
FLORA Native_Mapping
VEGETATION Floristic_Classification
VEGETATION Structural_Mapping
Thesaurus name:
Title: ANZLIC Search Words

Abstract:
This key layer is the index to the input datasets collated into the estimated pre-1750 (pre-clearing, pre-European) theme of the NVIS Version 4.1 dataset (from which the NVIS Major Vegetation Groups and Subgroups were derived).

The layer is intended to document and describe the input datasets and assist in dynamic analyses of data quality and gaps in the NVIS pre-1750 theme dataset. Important information in the spatial feature class includes the dataset spatial extent (i.e. its "footprint"), dataset number and the source of the underlying dataset. Where more than one dataset have been combined within a region (mainly NSW & NT), a complex of footprints is the result.

A lookup table provides important information, such as dataset title, scale and the on-ground range of dates of the vegetation survey. Attributes in the lookup table NVIS4_1_LUT_KEY_DSETn (from the NVIS DATASET and VERSION_USAGE Oracle tables, where n = an incremental number for minor version updates) need to be attached to this spatial data via DATA_SET_NUMBER. See metadata for this LUT for more details.

Acknowledgements
NVIS Version 4.1 was compiled from data supplied by the following Australian State and Territory vegetation mapping agencies:
- Planning, Conservation and Land, Environment and Sustainable Development Directorate, ACT Government.
- Office of Environment and Heritage, NSW
- Department of Natural Resources, Environment and The Arts, Northern Territory
- Queensland Herbarium, Department of Science, Information Technology, Innovation and the Arts (formerly DERM)
- Department for Environment and Natural Resources, South Australia
- Department of Primary Industries, Parks, Water and Environment, Tasmania
- Department of Sustainability and Environment, Victoria
- Department of Agriculture and Food, Western Australia.

Dataset language: English
Dataset character set: utf8 - 8 bit UCS Transfer Format
Update Status: completed
Maintenance:
Update frequency: as needed

Resource constraints:
Access constraints:
Available to third parties via a standard Departmental Licence Agreement.

Data can be used subject to full acknowledgements - see Description/Abstract.
Limitations of use:
Suitable for understanding and mapping various NVIS data source and quality attributes.

Applications involving futher use of the data may need to resolve the minor, but numerous, sliver and overlap issues.



In an attempt to mitigate this issue, artificial vector layers were created for SA and ACT by cutting present native vegetation into the Carnahan estimated pre-1750 data for these areas. This assumes no change in vegetation type - just whether the type remains (i.e. hasn't been cleared).

No vector estimated pre-1750 layers are available for NSW and Tasmania. However, estimated pre-1750 layers have been developed under the Major Vegetation Group and Major Vegetation Subgroup products, using the same logic as above.

Spatial representation type: vector
Resource format:
Format name: SDE Feature Class
Format version: 1
Spatial resolution:
Dataset's scale:
Scale denominator: 250000
Resource's bounding rectangle:
Extent type: Full extent in decimal degrees
Extent contains the resource: Yes
West longitude: 153.638310
East longitude: 153.638310
North latitude: -9.000000
South latitude: -43.664038

Supplemental information:
to be published internally

Point of contact:
Organisation's name: Australian Government Department of the Environment
Contact's position: Vegetation Data Manager
Contact's role: point of contact
Contact information:
Phone:
Voice: 02 6274 1111
Fax: 02 6274 1666
Address:
Delivery point:
GPO Box 787
City: Canberra
Administrative area: ACT
Postal code: 2601
Country: Australia
e-mail address: vegetation.metadata@environment.gov.au

Spatial Representation:

Spatial Representation - Vector:

Reference System Information:

Reference system identifier:
Value: GCS_GDA_1994

Data Quality Information:

Scope of quality information: dataset

Lineage:
Spatial data
------------------
NVIS v4.1 estimated pre-1750 (where supplied) or extant data provided by state/territory data custodians were dissolved on DATASET_NUMBER in ArcGIS versions 9.3 and/or 10. Non-native and/or non-vegetation polygons were not always provided by custodians, so the outer boundaries of some datasets were derived from the version 3.1 key layer (which may have been approximated by on-screen digitising), or where they coincided with the coast or a state border, using the AUSLIG Australian State Borders (1:100000) or Coastlines Datasets. Some data gaps in this dataset will occur where gaps exist in the actual data, while others may have been filled for various cartographic or operational reasons.

Correction to spatial data, October 2012
----------------------------------------------------------
It was noted that the key layer for Pre1750 did not accurately represent the NVIS SA data for the area around Lake Alexandrina (Murray River mouth). Corrections were made to ‘fill in’ the Key layer for this area in the south of SA as the lake is represented in NVIS as NVIS_ID 90193 - Inland Aquatic.

Attribute Data
---------------------
The spatial operations were performed with minimal attribution.

Overall
-----------
On-screen data quality checking and validation was undertaken.

Source data acknowledgements:
See Description/Abstract.

Data quality report - Absolute external positional accuracy:
The positional accuracy corresponds to the positional accuracy of each input data set. Accuracy is variable depending on the scale and source of the input data, which ranges between 1:4,000 and 1:5,000,000. This feature class would have a similar range of inputs and should thus be used at scales circa 1:250000 or coarser. Use at finer scales may be unreliable.

Data quality report - Attribute accuracy:
Attributes
STATE: state of origin of the dataset
DATASET_NUMBER: A number assigned by the ERIN Vegetation Team to the underlying dataset. This links to an associated lookup table (NVIS4_1_LUT_KEY_DSETn, where n is an incremental number for minor updates) with other key attributes (see separate metadata for details).

Data quality report - Conceptual consistency:
The dataset is consistent for attributes relating to the dataset in each footprint.

Applications involving futher use of the data may need to resolve the minor, but numerous, sliver and overlap issues.

In some instances, estimated pre-1750 vegetation typing supplied by custodians is not comparable with the extant vegetation. This was a problem in ACT, NSW, SA and TAS, so comparable layers were created by ERIN for use in the MVG and MVG datasets. The key layer reflects the changes made by ERIN.

Data quality report - Completeness:
This dataset depicts the actual footprints of all source datasets used in NVIS Version 4.1.

In some instances, the source data compiled does not yet meet the target criteria specified for NVIS Version 1:100K or better in the Intensive Landuse Zone and 1:250 K or better in the Extensive Landuse Zone.

Attributes are complete. However, spatial and attribute data on small islands may be absent or highly unreliable.

Vegetation data with NVIS descriptions do not provide a complete coverage of vegetation for all of Australia and some significant gaps remain, particularly in NSW and SA.

Distribution Information:

Organisation's name: Australian Government Department of the Environment
Available format:
Format name: ArcGIS File geodatabase
Format version: 1
Available format:
Format name: Shapefile
Format version: 1
Transfer options:
Online source:
Online location: National Vegetation Information System (NVIS) Version 4.1 - Australia - Key Layer for the Sources of Estimated Pre-1750 Vegetation Data
Description: Offline Data
Online source:
Online location: National Vegetation Information System (NVIS) Version 4.1 - Australia - Key Layer for the Sources of Estimated Pre-1750 Vegetation Data
Description: Downloadable Data

Metadata Information:

Metadata language: eng
Metadata character set: utf8 - 8 bit UCS Transfer Format
Last update: 20131023
Metadata contact:
Organisation's name: Australian Government Department of the Environment
Contact's position: Vegetation Data Manager
Contact's role: point of contact
Contact information:
Phone:
Voice: 02 6274 1111
Fax: 02 6274 1666
Address:
Delivery point:
GPO Box 787
City: Canberra
Administrative area: ACT
Postal code: 2601
Country: Australia
e-mail address: vegetation.metadata@environment.gov.au
Name of the metadata standard used: ANZLIC Metadata Profile
Version of the metadata standard: 1.1
Metadata identifier: 03F11B0B-110D-42CC-95F6-C256CBBC40C2